Demand Elasticities in International Trade: Are They Really Low?

For the first time in the economics literature, Panagariya, Shah, and Mishra obtain import demand elasticities for a small country (Bangladesh) that are very large. The elasticities are based on parameters of a utility function that are systematically of the correct sign and statistically significant. Using highly disaggregated data, both own-price and cross-price elasticities are estimated. Most economists are comfortable with the assumption that import demand elasticities facing small countries such as Austria, Belgium, and Denmark are approximately infinite. Yet the actual estimates of import demand elasticities for these and other countries are disturbingly low. Typical estimates range from 1-2, and in rare cases rise to 3. Such estimates seriously undermine the case for unilateral liberalization since they suggest considerable market power on the part of even small economies. They also raise doubts about the ability of exports to serve as an engine of growth. With import demand elasticities lying between 1 and 3, a 20 percent annual expansion in exports would, for example, lead to a substantial deterioration in the terms of trade. Panagariya, Shah, and Mishra analyze the U.S. demand for imports from Bangladesh for the products restricted under the Multifiber Arrangement. Because Bangladesh is only a small supplier of these products and close substitutes are available from many Asian and Latin American countries, they expected the elasticity of demand for Bangladeshi imports to be high. Their estimates of own-price elasticity are consistently high, exceeding 65 in all cases.This finding accords with trade theorists' prejudice that small countries can essentially behave as price takers but conflicts with the view in the empirical literature that demand elasticities rarely exceed 3 and are generally between 1 and 2. The authors' analysis ...